Can you provide your bitcoin address? Either a transaction was created and your balance at block explorer will show deducted or it will show the full balance.

If it is the latter then just close the electrum, restart it and your balance should appear as it was, if it doesn't then just manually change the servers. If that doesn't work either then move the electrum wallet directory to a safe place and restore electrum from its seed.

Don't worry your coins are safe.